---
schema_version: "secwatch.filing_event.v1"
accession: "0001049521-23-000015"
form_type: "8-K"
ticker: "MRCY"
cik: "0001049521"
company_name: "MERCURY SYSTEMS INC"
filed_at: "2023-06-23T23:59:59+00:00"
generated_at: "2026-06-13T17:33:50.670891+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Mercury Systems ends sale process, appoints Bill Ballhaus interim CEO after Mark Aslett resigns

## Summary
- Board concluded strategic alternatives review; no sale option reflected intrinsic value, will focus on enhanced execution under refreshed leadership.
- Mark Aslett resigned as President and CEO effective June 24, 2023; Board disputes his claim of 'good reason' termination.
- William L. Ballhaus appointed interim President and CEO; search for permanent CEO begun with executive search firm.
- Gerard DeMuro appointed independent director; second independent director (former aerospace CEO) expected soon.
- Permanent CFO identified; announcement expected in coming weeks; Michelle McCarthy to remain as CAO.

## SEC filing metadata
- accession: 0001049521-23-000015
- form_type: 8-K
- ticker: MRCY
- cik: 0001049521
- company_name: MERCURY SYSTEMS INC
- filed_at: 2023-06-23T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1049521/000104952123000015/0001049521-23-000015-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1049521/000104952123000015/mrcy-20230623.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001049521-23-000015
- JSON: https://secwatch.observer/filing/0001049521-23-000015.json
- Plain text: https://secwatch.observer/filing/0001049521-23-000015.txt

## Key facts
- Executive change
  William L. Ballhaus was appointed as interim President and Chief Executive Officer at MERCURY SYSTEMS INC.
  - Action: appointed
  - Role: interim President and Chief Executive Officer
  source text: The Board of Directors (the “Board”) of Mercury Systems, Inc. (the “Company”) has appointed William L. Ballhaus as the Company’s interim President and Chief Executive Officer effective as of June 24, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1049521/000104952123000015/0001049521-23-000015-index.htm
- Executive change
  Mark Aslett resigned as President and Chief Executive Officer at MERCURY SYSTEMS INC.
  - Action: resigned
  - Role: President and Chief Executive Officer
  source text: On June 19, 2023, Mark Aslett, the Company’s President and Chief Executive Officer, delivered a letter to the Board resigning from his positions of President and Chief Executive Officer and the Board has accepted Mr. Aslett’s resignation effective as of June 24, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1049521/000104952123000015/0001049521-23-000015-index.htm
- Executive change
  Gerard J. DeMuro was appointed as independent director at MERCURY SYSTEMS INC.
  - Action: appointed
  - Role: independent director
  source text: The Board of Directors has appointed Gerard J. DeMuro, Co-CEO of Eve Air Mobility, as an independent director in Class II of the Board, effective June 24, 2023, for a term expiring at the 2023 annual meeting of shareholders.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1049521/000104952123000015/0001049521-23-000015-index.htm
- Executive change
  Mark Aslett departed as member of the Board at MERCURY SYSTEMS INC.
  - Action: removed without cause
  - Role: member of the Board
  source text: Mr. Aslett has been removed without cause from his position as a member of the Board effective as of June 24, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1049521/000104952123000015/0001049521-23-000015-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.